Biden, Warren top latest poll of 2020 Democratic field

Former Vice President Joe BidenJoe BidenBiden says Trump executive order is 'a reckless war on Social Security' Trump got into testy exchange with top GOP donor Adelson: report Blumenthal calls for declassification of materials detailing Russian threat to US elections MORE and Sen. Elizabeth WarrenElizabeth WarrenBiden campaign says no VP pick yet after bike trail quip Biden edges closer to VP pick: Here's who's up and who's down Democratic convention lineup to include Ocasio-Cortez, Clinton, Warren: reports MORE (D-Mass.) are leading the 2020 Democratic presidential field, according to a poll released Thursday.

The NBC News/Wall Street Journal survey found that 26 percent of likely primary voters support Biden, while 19 percent support Warren. Trailing those two are Sens. Kamala HarrisKamala Devi HarrisBiden campaign says no VP pick yet after bike trail quip Hillary Clinton roasts NYT's Maureen Dowd over column Biden edges closer to VP pick: Here's who's up and who's down MORE (D-Calif.) and Bernie SandersBernie SandersThe Memo: Trump team pounces on Biden gaffes The Hill's Campaign Report: US officials say Russia, China are looking to sow discord in election Warren urges investment in child care workers amid pandemic MORE (I-Vt.), who are each backed by 13 percent. 

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The only other contenders who receive support from more than 1 percent of voters are South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegCNN's Ana Navarro to host Biden roundtable on making 'Trump a one-term president' Former Indiana Gov. Joe Kernan dies How Republicans can embrace environmentalism and win MORE with 7 percent, former Texas Rep. Beto O'RourkeBeto O'RourkeBeto O'Rourke calls Texas GOP 'a death cult' over coronavirus response Hegar, West to face off in bitter Texas Senate runoff Bellwether counties show trouble for Trump MORE with 2 percent and former tech executive Andrew YangAndrew YangProgressive candidate Bush talks about her upset primary win over Rep. Clay Is this the end of the 'college experience'? Biden campaign to take over 'Supernatural' star's Instagram for interview MORE with 2 percent. 

Warren reportedly fares best with self-described liberals and those aged 18 to 49, while Biden is strongest among older Democrats and African Americans.

Respondents were also asked about their second-choice candidate, which Harris led with 14 percent. She was followed by Warren with 13 percent, Sanders with 12 percent and Biden with 10 percent. 

Only 12 percent of Democratic primary voters, however, said they had definitively made up their mind about their choice. 

Researchers surveyed 800 registered voters including 400 Democratic primary voters between July 7 and 9, after the first primary debates. The margin of error on the primary voters is 4.9 percentage points.